Why are my PitchiPoy Knee and Elbow Directions wrong?
I'm using rigify/pitchipoy in 2.79, if you click on the cog shape at the top of the legs or the arms an extra option shows up under rig main properties called pole_vector.

It's bascially a boolean (set it to 0 or 1), set it to 1 and you'll see normal pole targets again.